{
  pkgs,
  inputs,
  lib,
  ...
}:
{

  # for FO4 VR:
  # doesn't work. it's like the wivrn stuff doesn't transfer past MO2
  # `echo "PRESSURE_VESSEL_FILESYSTEMS_RW=$XDG_RUNTIME_DIR/wivrn/comp_ipc %command%" | sed -r "s/proton waitforexitandrun .*/proton waitforexitandrun \/media\/games\/fallout4vr_essentials_overhaul\/ModOrganizer.exe \"moshortcut:\/\/:Play Fallout Essentials\" /" | sh`

  services.wivrn = {
    enable = true;
    openFirewall = true;

    package = (
      # https://github.com/NixOS/nixpkgs/pull/391367
      pkgs.wivrn.overrideAttrs (old: {
        cmakeFlags = old.cmakeFlags ++ [
          (lib.cmakeFeature "OPENCOMPOSITE_SEARCH_PATH" "${pkgs.opencomposite}/lib/opencomposite")
        ];
      })
    );

    # Write information to /etc/xdg/openxr/1/active_runtime.json, VR applications
    # will automatically read this and work with wivrn
    defaultRuntime = true;

    # Executing it through the systemd service executes WiVRn w/ CAP_SYS_NICE
    # Resulting in no stutters!
    autoStart = true;

    # Config for WiVRn
    config = {
      enable = true;
      json = {
        # 1.0x display scaling
        scale = 1.0;
        # 100 Mb/s
        bitrate = 100000000;
        encoders = [
          {
            encoder = "vaapi";
            codec = "h265";
            # 1.0 x 1.0 scaling
            width = 1.0;
            height = 1.0;
            offset_x = 0.0;
            offset_y = 0.0;
          }
        ];

        application = [ pkgs.wlx-overlay-s ];
      };
    };
  };
}